/* ================================================================
   IDNA Partners — editorial consulting theme
   Deep navy bands, warm ivory paper, near-black ink,
   restrained brass accent. Flat surfaces, hairline rules,
   serif display type.
   ================================================================ */
:root {
  --paper: #f4f0e7;        /* warm ivory */
  --white: #ffffff;
  --ink: #1b1b19;
  --ink-soft: #55554f;
  --navy: #0b2136;         /* primary dark band */
  --navy-deep: #081726;    /* deepest band */
  --navy-accent: #123a5c;  /* accent on light backgrounds */
  --brass: #c9a35c;        /* small details only */
  --rule: #ddd6c6;
  --rule-soft: #e7e2d5;
  --rule-dark: rgba(255, 255, 255, 0.18);
  --serif: "Source Serif 4", Georgia, "Times New Roman", serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.container {
  width: min(1180px, 90%);
  margin: 0 auto;
}

h1, h2, h3 {
  font-family: var(--serif);
  font-weight: 400;
  color: var(--ink);
  line-height: 1.12;
}

h1 { font-size: clamp(2.6rem, 6vw, 5rem); letter-spacing: -0.01em; }
h2 { font-size: clamp(2rem, 3.6vw, 3.1rem); margin-bottom: 0.5em; max-width: 22em; }
h3 { font-size: 1.45rem; }

.eyebrow {
  font-family: var(--sans);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 1.4rem;
}
.eyebrow-light { color: var(--brass); }

.section { padding: 130px 0; }
.section-white { background: var(--white); }

section[id] { scroll-margin-top: 84px; }

.section-dark { background: var(--navy); }
.section-dark h2 { color: #fff; }

.section-lead {
  max-width: 660px;
  color: var(--ink-soft);
  font-size: 1.13rem;
  margin-bottom: 4rem;
}

/* ================= Header ================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--navy);
  border-bottom: 1px solid var(--rule-dark);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 0;
}

.brand {
  font-family: var(--serif);
  font-size: 1.45rem;
  font-weight: 600;
  color: var(--paper);
  text-decoration: none;
  letter-spacing: 0.01em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 34px;
}

.site-nav a {
  color: rgba(255, 255, 255, 0.85);
  text-decoration: none;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  white-space: nowrap;
  padding-bottom: 3px;
  border-bottom: 1px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}
.site-nav a:hover { color: #fff; border-bottom-color: #fff; }

.nav-contact {
  color: var(--brass) !important;
  border-bottom-color: var(--brass) !important;
}
.nav-contact:hover { color: #dcbc7e !important; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}
.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--paper);
  transition: transform 0.25s, opacity 0.25s;
}
.nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ================= Hero ================= */
.hero {
  min-height: calc(100vh - 78px);
  display: flex;
  align-items: center;
  padding: 90px 0;
  background: var(--navy);
}

.hero h1 {
  color: #fff;
  max-width: 15em;
  margin-bottom: 0.55em;
}

.hero-sub {
  max-width: 660px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 1.24rem;
  line-height: 1.6;
  margin-bottom: 3.2rem;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 36px;
  flex-wrap: wrap;
}

.hero .btn {
  background: var(--paper);
  color: var(--navy);
  border-color: var(--paper);
}
.hero .btn:hover { background: #fff; }

.hero .arrow-link {
  color: rgba(255, 255, 255, 0.9);
  border-bottom-color: rgba(255, 255, 255, 0.55);
}
.hero .arrow-link:hover { color: var(--brass); border-bottom-color: var(--brass); }

/* ================= Buttons & links ================= */
.btn {
  display: inline-block;
  padding: 19px 42px;
  background: var(--navy-accent);
  color: #fff;
  text-decoration: none;
  font-size: 0.84rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  border: 1px solid var(--navy-accent);
  transition: background 0.2s, color 0.2s;
}
.btn:hover { background: var(--navy); border-color: var(--navy); }

.btn-light {
  background: var(--paper);
  color: var(--navy);
  border-color: var(--paper);
}
.btn-light:hover { background: #fff; color: var(--navy-deep); }

.arrow-link {
  color: var(--ink);
  text-decoration: none;
  font-size: 0.86rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  border-bottom: 1px solid var(--ink);
  padding-bottom: 3px;
  transition: color 0.2s, border-color 0.2s;
}
.arrow-link:hover { color: var(--navy-accent); border-color: var(--navy-accent); }
.arrow-link span { margin-left: 6px; }

/* ================= Pillars strip ================= */
.pillars {
  background: var(--navy-deep);
  padding: 78px 0;
}

.pillars-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 48px;
}

.pillar-num {
  display: block;
  font-family: var(--serif);
  font-size: 0.95rem;
  color: var(--brass);
  margin-bottom: 14px;
}

.pillar-item h3 {
  font-family: var(--sans);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: #fff;
  margin-bottom: 10px;
}

.pillar-item p {
  color: rgba(255, 255, 255, 0.66);
  font-size: 0.99rem;
  line-height: 1.55;
}

/* ================= About ================= */
.two-col {
  display: grid;
  grid-template-columns: 5fr 6fr;
  gap: 80px;
  align-items: start;
}

.about-copy p {
  color: var(--ink-soft);
  font-size: 1.13rem;
}
.about-copy p + p { margin-top: 1.3em; }

/* ================= Expertise ================= */
.expertise-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--rule);
}

.expertise-col {
  padding: 44px 40px 10px 0;
}
.expertise-col + .expertise-col {
  border-left: 1px solid var(--rule);
  padding-left: 40px;
}

.expertise-col h3 {
  margin-bottom: 1.2rem;
  color: var(--navy-accent);
}

.expertise-col ul { list-style: none; }

.expertise-col li {
  padding: 12px 0;
  border-bottom: 1px solid var(--rule-soft);
  color: var(--ink-soft);
  font-size: 1.03rem;
  line-height: 1.5;
}
.expertise-col li:last-child { border-bottom: none; }

/* ================= Services ================= */
.service-list { border-top: 1px solid var(--rule); }

.service-row {
  display: grid;
  grid-template-columns: 90px 1fr 1.25fr;
  gap: 40px;
  padding: 48px 0;
  border-bottom: 1px solid var(--rule);
}

.service-num {
  font-family: var(--serif);
  font-size: 1rem;
  color: var(--brass);
  padding-top: 6px;
}

.service-row h3 { max-width: 12em; }

.service-row p {
  color: var(--ink-soft);
  font-size: 1.06rem;
}

/* ================= Approach (dark band) ================= */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 44px;
  margin-top: 3.5rem;
}

.step {
  border-top: 1px solid var(--rule-dark);
  padding-top: 24px;
}

.step-num {
  font-family: var(--serif);
  font-size: 0.95rem;
  color: var(--brass);
}

.step h3 {
  margin: 12px 0 10px;
  font-size: 1.4rem;
  color: #fff;
}

.step p {
  color: rgba(255, 255, 255, 0.68);
  font-size: 1.01rem;
}

/* ================= Why ================= */
.why-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 80px;
  margin-top: 1rem;
}

.why-item {
  border-top: 1px solid var(--rule);
  padding: 34px 0 40px;
}

.why-item h3 {
  color: var(--navy-accent);
  margin-bottom: 0.6rem;
  font-size: 1.45rem;
}

.why-item p {
  color: var(--ink-soft);
  font-size: 1.06rem;
  max-width: 30em;
}

/* ================= Contact ================= */
.contact {
  background: var(--navy-deep);
  padding: 110px 0;
}

.contact h2 { color: #fff; }

.contact-lead {
  color: rgba(255, 255, 255, 0.72);
  max-width: 600px;
  font-size: 1.14rem;
  margin-bottom: 2.6rem;
}

/* ================= Footer ================= */
.site-footer {
  background: var(--navy-deep);
  border-top: 1px solid var(--rule-dark);
  padding: 46px 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  flex-wrap: wrap;
}

.footer-brand {
  font-family: var(--serif);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--paper);
}

.footer-tag {
  color: rgba(255, 255, 255, 0.55);
  font-size: 0.85rem;
}

.footer-nav { display: flex; gap: 26px; }

.footer-nav a {
  color: rgba(255, 255, 255, 0.75);
  text-decoration: none;
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.footer-nav a:hover { color: var(--brass); }

.footer-legal {
  color: rgba(255, 255, 255, 0.55);
  font-size: 0.8rem;
}

/* ================= Responsive ================= */
@media (max-width: 1000px) {
  .pillars-grid { grid-template-columns: repeat(2, 1fr); gap: 40px; }
  .two-col { grid-template-columns: 1fr; gap: 30px; }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .service-row {
    grid-template-columns: 60px 1fr;
    gap: 10px 24px;
  }
  .service-row p { grid-column: 2; }
}

@media (max-width: 900px) {
  .nav-toggle { display: flex; }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    background: var(--navy);
    border-bottom: 1px solid var(--rule-dark);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }
  .site-nav.open { max-height: 440px; }
  .site-nav a {
    width: 100%;
    padding: 16px 5%;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    border-bottom: none;
  }
  .nav-contact { border-bottom: none !important; }
}

@media (max-width: 680px) {
  .section { padding: 76px 0; }
  .hero { min-height: auto; padding: 84px 0 80px; }
  .contact { padding: 80px 0; }
  .br-desk { display: none; }

  .pillars-grid, .steps, .why-grid, .expertise-grid { grid-template-columns: 1fr; }

  .why-item { padding: 28px 0 30px; }

  .expertise-grid { border-top: none; }
  .expertise-col {
    padding: 34px 0 6px;
    border-top: 1px solid var(--rule);
  }
  .expertise-col + .expertise-col {
    border-left: none;
    padding-left: 0;
  }

  .service-row { padding: 32px 0; }

  .footer-inner { flex-direction: column; align-items: flex-start; }
}